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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 549 · 40 questions
TalentJR

How it works (Round and adjust): Round up: 49 is 50 − 1, 98 is 100 − 2. Multiply by the round number. Take away the number times the bit you added.

NameDateTime takenScore ___ / 40
  1. 1.13 × 49 =
  2. 2.12 × 99 =
  3. 3.8 × 19 =
  4. 4.8 × 19 =
  5. 5.3 × 9 =
  6. 6.5 × 49 =
  7. 7.6 × 29 =
  8. 8.32 × 98 =
  9. 9.5 × 9 =
  10. 10.8 × 19 =
  11. 11.27 × 99 =
  12. 12.3 × 19 =
  13. 13.12 × 29 =
  14. 14.3 × 19 =
  15. 15.5 × 49 =
  16. 16.7 × 9 =
  17. 17.3 × 99 =
  18. 18.11 × 9 =
  19. 19.33 × 98 =
  20. 20.18 × 99 =
  21. 21.14 × 9 =
  22. 22.12 × 29 =
  23. 23.9 × 29 =
  24. 24.4 × 99 =
  25. 25.3 × 49 =
  26. 26.14 × 19 =
  27. 27.4 × 29 =
  28. 28.6 × 19 =
  29. 29.29 × 99 =
  30. 30.14 × 29 =
  31. 31.14 × 99 =
  32. 32.4 × 99 =
  33. 33.11 × 19 =
  34. 34.9 × 9 =
  35. 35.7 × 29 =
  36. 36.13 × 99 =
  37. 37.5 × 49 =
  38. 38.3 × 99 =
  39. 39.20 × 98 =
  40. 40.33 × 99 =

Answer key

  1. 637
  2. 1188
  3. 152
  4. 152
  5. 27
  6. 245
  7. 174
  8. 3136
  9. 45
  10. 152
  11. 2673
  12. 57
  13. 348
  14. 57
  15. 245
  16. 63
  17. 297
  18. 99
  19. 3234
  20. 1782
  21. 126
  22. 348
  23. 261
  24. 396
  25. 147
  26. 266
  27. 116
  28. 114
  29. 2871
  30. 406
  31. 1386
  32. 396
  33. 209
  34. 81
  35. 203
  36. 1287
  37. 245
  38. 297
  39. 1960
  40. 3267

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